<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<body>

<div id="app"> 
  <h2>{{fullName}}</h2>
</div>
  
<script src="../js/vue.js"></script>
<script>
  const app = new Vue({
    el: '#app',//用于挂载要管理的元素
    data: {
      firstName: 'Kobe',
      lastName: 'Bryant'
    },
    computed: {
      // fullName: function () {
      //   return this.firstName + ' ' + this.lastName 
      // }
      // name: 'coderwhy'
      //计算属性一般是没有set方法，只读属性
      fullName: {
        // set: function (newValue) {
        //   // console.log('---------', newValue)
        //   const names = newValue.split(' ')
        //   this.firstName = names[0]
        //   this.lastName = names[1]
        // },
        get: function() {
          return this.firstName + ' ' + this.lastName 
        }
      }

      // fullName: function () {
      //   return this.firstName + ' ' + this.lastName 
      // }
    }
  })
</script>

</body>
</html>